This paper describes the total synthesis of thelephantin G, thus revising the proposedstructure 1 to 2. The key steps involved a double Suzuki−Miyaura coupling and an esterification reaction. By a similar strategy, ganbajuninsD and E (3 and 4) were also prepared. Compound 2 strongly inhibited TNF (tumor necrosis factor)-α production in rat basophilic leukemia (RBL-2H3) cells: IC50 = 3.5 nM, while